A visitor's visa allows you to stay in Norway or other countries in the Schengen area for up to 90 days over a period of 180 days.
If you plan to visit more than one Schengen country in the course of one trip, or if you plan several separate trips within a period of two months, you must submit your application to the embassy or consulate of the country that is your main destination based on the length of your stay, or the purpose of stay.
If you plan to visit several Schengen countries and the main destination cannot be determined, you must submit your application to the embassy or consulate of the country that is your first point of entry to the Schengen area.
Nationals from The Seychelles do not need a visa to visit Norway and may stay in the country for a period of up to 90 days. Still, there are additional rules you must follow, see UDI webpage.
Other nationals with a valid residence permit in the Seychelles who need a visa to visit Norway, must apply at on of the VFS Global Application Centers in either Nairobi, Addis Ababa, Kampala or Dar es Salaam.